Sole-sewing machine



Nov. 18, 1941. A. EHRESMANN\ ETAL SOLE-SEWING MACHINE Filed Aug. 8, 1938 2 Sheets-Sheet 1 Nov. 18, 1941. A. EHRESMANN arm. 2,262,889

SOLE-SEWING MACHINE Filed Aug. 8, 1938 2 Sheets-Sheet 2 Inventors:

Patented Nov. 18, 1941 SOLE-SEWING MACHINE Q Adam Ehresmann, Kaiserslautern, Pfalz, and

Ludwig Streibel, Karlsruhe, Baden, Germany I Application August 8, 1938, Serial No. 223,559% Q In Germany August 13, 1937 8 Claims.

This invention relates to improvements in solesewing machines and more particularly to machines of this kind having an arcuate-shaped needle, oscillatable in the-direction of the arc and an awl of similar shape and oscillatable around the same axis, which awl is considerably shorter and somewhat thicker and thus more resistant than the needle.

One object of the invention is to provide an improved construction which is particularly advantageous in use for the re-soling of Worn-out footwear with existing stitch-holes.

Another object is so to mount the awl and needle that both tools can pierce the work from the same side. that is to say, from above.

A further object of the invention is to provide a construction in which the needle and the awl are arranged displaced with respect to one another along their axis of oscillation and, on completion of a working operation by one of the tools, the two holders are moved along their axis of oscillation to an amount equal to the distance of the tools from one another, whereby the other tool is brought into the same plane of oscillation.

A still further object is to provide common operating means for oscillating the two tools.

A still further object is to provide an operating lever for the two tools, which is adapted, during movement to efl'ect alternate oscillation of the tool holders, to be coupled to one holder and to be uncoupled from the other and vice versa.

In order that the invention may be fully understood, we shall now describe one embodiment thereof, by Way of example, by reference to the accompanying drawings, in which:

Fig. 1 is a part sectional side View of the needle and awl holders and pertaining parts of a sole-sewing machine embodying the invention and'showing the parts in one working position with the awl piercing the work or sole and the needle retracted.

Fig. 2 is a similar view to Fig, 1, but showing the parts in another working position with the needle penetrating the work or sole and the awl retracted.

Fig. 3 is a rear view of the mechanism with the parts in the position shown in Fig. 1.

Fig. 4 is a similar'view to Fig. '1 showing the common operating lever for actuating the awl and needle holders, and

Fig. 5 is a plan view thereof.

Referring to the drawings:

The awl a and the needle 17 are each clamped.

in a holder or carrier consisting of two clamping jaws. The awl holder 0 is fixedly mounted on a rock-shaft or spindle d forming an axis of oscillation therefor and the needle holder e-is freely mounted, closely adjacent the awl holder and on the hub thereof. The shaft d is rotatably and longitudinally displaceably mounted in the bearing 1 (Fig. 3) and the hub of the workpresser g, which hub is itself rotatably but not displaceably mounted in the bearing h. The awl-holder c has an arm 2', and the hub of the needle-holder e is provided with an arm 7c, whilst on the end of the presser hub projecting from the bearing h, there is secured a lever l. A screw t (Fig. 3) having an eye u, is screwed into the shaft d and a lever m is pivoted at its upper end to the eye u by means of a pin 2). The lever m is formed as a rocking lever although, for the sake of simplicity, it has not been so shown in the drawings.

In the position shown in Figs. 1 and 3, the awl a, the plane of which passes through the perforation or hole n in the stitch-plate or work support 0, has penetrated the foot 10 of the workpresser g and punctured the work or sole q lying on the work-support, whilst the point of the needle I), which is displaced with regard to the awl 11 along the shaft d by an amount at, lies substantially above the presser foot 12. Directly after the awl holder 0 has been swung back into the position shown in Fig. 2, the shaft d, together with the parts a, b, c, e, i and 7c, is moved by the lever m through the distance :1: towards the bearing h, the needle 1) taking up a position in I the plane of oscillation, passing through the hole 12 in the stitch-plate or work-support o, the awl a entering a groove 9' formed in the inner face of the work-presser g and at a distance equal to 3:, from the original position of the said awl a. The small clamping jaw of the awl holder 0 in this position of the parts faces the presser g lying in line with, but behind, the said presser. The needle holder 6 is then swung into the position shown in Fig. 2 and immediately withdrawn, the needle b passing through the perforation or hole formed in the work or sole q by the awl a and through the perforation n of the stitch-plate 0, thereby forming a stitch.

Immediately after the removal of the needle from the work or sole, the presser g is lifted somewhat by a member engaging the lever l and the work or sole, thus freed, is displaced in a known manner through a distance equal to a stitch-length in the direction from it towards f. After the presser has again been lowered, so

' hole in the work or sole.

that it once more holds the Work or sole, the shaft d is moved back, that is to say, towards the bearing through the distance a: by the lever m, so that all the parts a, b, e, z and is again take up the position shown in Fig. 3. The awl holder then, immediately, again swings into the position of Fig. 1, the awl a once more piercing a The above described sequence of operations is then repeated,

As shown in Figures 4 and 5 a common operating lever 1' can be used for oscillating the two holders 0 and e, which lever, during the reciprocation of the shaft (1, is alternately coupled to the arm i of the holder 0 and uncoupled from the arm is of the holder 6 or vice versa, a pin s arranged on one arm entering a slot 2 formed on the lever r and at the same time another pin s carried by the other arm becoming disengaged from the said slot.

We claim: l

1.;In a sole-sewing machine of the'kin'd re ferred to, the combination of a work support; an arcuate-curv-ed needle located on one side of said work support for oscillation about an axis; an arcuate curved awl located on the same side of said work-support for oscillation about the same Qaxis,,and said awl being arranged displaced with respect to said needle in a direction par- ,allel to said axis; means for bodily moving said needleand said awl simultaneously in a direction parallel to the axis of oscillation thereof to an amount equal to the distance apart of said needle and awl; and common actuating means for oscillating said needle and awl alternately.

' 2. In a sole-sewing machine of the kind referred to, the combination of: a frame; a worksupport; a rotatable and longitudinally movable shaft mounted in said frame; an awl fixedly carried by said shaft, said awl normally lying above said work-support in its plane of oscillation; a needle rotatably carried by-said shaft, said needle being also located above said worksupport and being spaced. from said awl longitudinally of said shaft; means for oscillating said'awl; means for moving said shaft longi-' tudinally for a distance equal to the distance between said awl and said needle to bring said needle into the plane of oscillation previously occupied by said awl; said needle being oscillated by said first means in its displaced position and means for returning said shaft to its normal position.

3. In a sole-sewing machine of the kind referred to, the combination of a work-support;

a rotatable and longitudinally movable shaft adjacent said work-support; an awl holder fixedly carried by said shaft; an arcuate-shaped awl carried by said holder on one side of said workparallel to the direction of said shaft; means for oscillating said awl; means for longitudinally displacing said shaft together with said awl holder" and needle holder for a distance equal to'the distance apart of said awl and needle so as to bring said needle into the plane of oscillation previously occupied by said awl; means for subsequently oscillating said needle in said plane of oscillation; and said shaft being subsequently returned to its normal position by said longitudinal displacing means.

4. In a sole-sewing machine of the kind referred to, the combination of: a support; a workpresser; a hub on said work-presser rotatably mounted in said support; a longitudinally displaceable rock-shaft mounted at one end in said support and at the other end in said presser hub; a work-support; an awl holder fixedly mounted on said shaft; a hub on said holder; an

awl carried by said holder above said work support for oscillation in a path concentric to the axis of said shaft and in a plane perpendicular to said axis, a needle holder rotatably mounted on said hub of said awl holder; a needle carried by said needle holder, said needle located on the same side of said Work-support as said awl and being spaced from said awl in a direction parallel to the direction of said rock shaft; an arm associated with said awl holder for oscillating said holder; -means for longitudinally moving said rock shaft together with said awl and needle holders for a distance equal to the dis tance between said awl and said needle, so as to bring said needle into the plane of oscillation previously occupied by said awl; and an arm associated with said needle holder for oscillatin said needle in this adjusted position.

5. In a sole-sewing machine of the kind referred to, the combination of: a support; a workpresser; a hub on said wor'k-presser rotatably mounted in said support; a longitudinally displaceable rock-shaft mounted at one end in said support and at the other end in said presser hub; an awl holder fixedly mounted on said shaft; a hub on said holder; an awl carried by said holder for oscillation in a plane passing through the working point thereof; a needle holder rotatably mounted on said hub of said awl holder; a needle carried -by said needle holder, said needle being spacedfrom said awl in a direction parallel to the direction of said rock shaft"; an and associated with said awl holder for oscillating said holder; means for longitudinally moving said rock shaft together with said awl and needle holders for a distance equal to the distance between said awl and said needle, so as to bring said needle into'the plane of oscillation previously occupied by said awl; an arm associated with said needle holder for oscillatingsaid nee dle in this adjusted position; and a common op erating lever for alternately oscillating said holders.

6. In a sole-sewing machine of the kind referred to, the combination of: a support; an oscillatable arcuate-shaped awl-carried by said support; an oscillatable arcuate-shaped needle carried by said support, a work-support, said awl and said needle located on the same side of said work-support and being oscillatable around a common axis, and saidneedle being spaced from said awl in a direction longitudinally of said common axis of oscillation; a rotatable workpress-er carried by said support, adjacent said awl, said presser having an internal groove therein spaced laterally from the normal position of the awl at a distance equal to the lateral space between the awl and needle; means for bodily movingsaid awl andsaid needle in a direction parallel to their axis of oscillation to cause said awl to enter said groove and said needle to lie in the plane of oscillation previously occupied by said awl for the purpose specified.

'7. In a sole-sewing machine of the kind referred to, the combination of a support; an osawl; a pin on each of said arms; and a common actuating lever for operating said arms, said lever having a slot therein with which said pins are adapted to engage, the arrangement being such that, on movement of said needle and awl axially in one direction, said lever engages one of said pins and disengages the other pin, and on movement thereof in the other direction said lever engages said second-mentioned pin and becomes disengaged from said previously engaged pm.

8. In a sole-sewing machine of the kind referred to, the combination of: a frame; a worksupport carried by said frame; an oscillatable needle located on one side of said work-support; an oscillatable awl carried by said frame, said awl being located on the same side of said worksupport as said needle and being arranged displaced longitudinally of said Work-support with respect to said needle; means for oscillating said awl towards and away from the work-support; means for bodily simultaneously moving said needle and awl in a direction parallel to the axis of oscillation thereof to an amount equal to the distance between the said needle and awl for the purpose specified; said needle being oscillated by said first means in this displaced position of said parts.

ADAM EI-IRESMANN. LUDWIG STREIBEL. 

